APM logs (BIGIP 13.0.0)

Hi all One of my APM users was denied by the access policy. Trying to troubleshoot the problem, i tried to search the session id in the reports. But only last day is shown (even when i try to show "all sessions"). How could i extend the reported days?

And (this i suppose has nothing to do with the reports, but not sure), i dont kwnow how to change the /var/log/apm files rotation (only 4 days stored).

Thanks for your help!